UltraFlux HE series

High Energy Femtosecond OPCPA Systems
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  • Based on the novel OPCPA technology
  • Patented front-end design
  • Up to 100 Hz repetition rate
  • Up to 1 J pulse energy
  • Down to 10 fs pulse duration
  • Based on the novel OPCPA technology
  • Patented front-end design
  • Up to 100 Hz repetition rate
  • Up to 1 J pulse energy
  • Down to 10 fs pulse duration

Features & Applications

Features

  • Based on the novel OPCPA (Optical Parametric Chirped Pulse Amplification) technology
  • Patented front-end design (patents no. EP2827461 and EP2924500)
  • Up to 1 J pulse energy at 10 Hz repetition rate
  • From Single Shot to 100 Hz pulse repetition rate
  • Down to 10 fs pulse duration
  • Up to 50 mJ pulse energy at 100 Hz repetition rate
  • Excellent pulse energy stability: ≤ 1 % RMS
  • Excellent long-term average power stability: ≤ 1.5 % RMS over 8-hour period
  • Perfectly synchronized fs and ps output option available
  • Hands free wavelength tuning
  • High contrast pulses without any additional improvement equipment

Applications

  • Broadband CARS and SFG
  • Femtosecond pump-probe spectroscopy
  • Nonlinear spectroscopy
  • High harmonic generation
  • Wake field particle acceleration
  • X-ray generation

Description

High Energy UltraFlux laser series delivers up to 25 TW peak power operating up to 10 Hz. Originally built for ELI‑ALPS (Extreme Light Infrastructure – Attosecond Light Pulse Source) in Hungary, this series is now available for a wide variety of applications.

The master oscillator is a patented (no. EP2827461 and EP2924500) all-in-fiber Yb doped picosecond laser seed source with two fiber outputs. One seeds the OPCPA Front-End and another seeds the Picosecond Pump Laser. Both outputs originate from the same fiber so they are optically synchronized.

This approach eliminates the need for a complex temporal synchronization system typically present in other OPCPA systems.
The Nd:YAG Picosecond Pump Laser system (PPL) is comprised of several sub-systems: diode pumped Regenerative Amplifier, diode pumped Preamplifier, flash lamp pumped Amplifiers, and Second Harmonic Generators which convert fundamental 1064 nm wavelength to 532 nm. PPL outputs multiple beams at 532 nm. One beam is directed to NOPCPA Front-End subsystem and others are directed to NOCPA amplification stages.

The Front-End NOPCPA (Non-collinear Optical Parametric Chirped Pulse Amplifier) consists of several sub-systems: Picosecond Optical Parametric Amplifier (ps-OPA) amplifying oscillator output pulses, Grating Compressor compressing ps-OPA output pulses, White Light Generator (WLG) broadening the spectrum of ps-OPA output pulses and Femtosecond Non-collinear Optical Parametric Amplifier (fs‑NOPA) amplifying WLG output pulses.

The Stretcher sub-system is a Grism (diffraction gratings combined together with prisms) or Offner type pulse stretcher, which stretches output pulse from NOPCPA Front-End and Dazzler (optional Acousto-Optic Programmable Dispersive Filter) for high order phase compensation.

Multiple stages of NOPCPA (Non-collinear Optical Parametric Chirped Pulse Amplifiers) are used to amplify the stretched pulse from the Stretcher up to 1 J.

Finally, amplified pulses are compressed back down to fs duration in the Pulse Compressor. Bulk glass compressor (combined together with chirped mirror) or traditional diffraction grating compressor can be used depending on pulse duration required and output energy level.

The built-in Output Diagnostics stage ensures reliable, turn-key operation by monitoring critical parameters such as energy, duration, and beam profile.

Specifications

ModelUltraFlux FT310UltraFlux FT10010UltraFlux FF50100-F10UltraFlux FF8005
MAIN SPECIFICATIONS 1)
Output energy 2)
    Signal3 mJ100 mJ50 mJ800 mJ
    SH output 3)0.6 mJ3.5 mJ 4)
    TH output 3)150 µJ1.2 mJ 4)
    FH output 3)30 µJ300 µJ 4)
Pulse repetition rate10 Hz10 Hz100 Hz5 Hz
Wavelength tuning range
    Signal750 – 960 nm840 nm
    SH output 3)375 – 480 nm420 nm
    TH output 3)250 – 320 nm280 nm
    FH output 3)210 – 230 nm210 nm
Scanning steps
    Signal5 nm
    SH output 3)5 nm
    TH output 3)3 nm
    FH output 3)2 nm
Pulse duration 5) 6)40 ± 20 fs≤ 10 fs40 ± 20 fs
Pulse energy stability 7)≤ 1.5 %≤ 1 %≤ 1.5 %
Long-term power drift 8)± 1.5 %
Beam spatial profileSuper Gaussian 9)
Beam diameter 10)~ 5 mm~ 30 mm~ 80 mm~ 70 mm
Beam pointing stability 11)≤ 30 µrad
Temporal contrast 12)
    APFC (within ± 50 ps)107 : 1107 : 1106 : 1107 : 1
    Pre-pulse (≤ 50 ps)109 : 1
    Post-Pulse (>50 ps)108 : 1
Optical pulse jitter 13)
    Trig out≤ 50 ps
    Pre-Trig out≤ 10 ps
    With –PLL option≤ 3 ps
PolarizationLinear
PHYSICAL CHARACTERISTICS 14)
Laser head size (W×L×H mm)900 × 1500 × 3001200 × 2000 × 3001200 × 3600 × 5001500 × 2000 × 500, 2 pc.
1200 × 2500 × 500
Power supply size (W×L×H mm)553 × 600 × 850553 × 600 × 1200553 × 600 × 1020
553 × 600 × 500
553 × 600 × 1800, 2 pc.
553 × 600 × 500
Umbilical length 15)5 m5 m2.5 m5 m
OPERATING REQUIREMENTS 16)
Electrical power200 – 240 V AC,
single-phase, 47 – 63 Hz
208, 380 or 400 V AC,
three-phase, 50/60 Hz 17)
Power consumption 18)≤ 1 kVA≤ 3.5 kVA≤ 6 kVA≤ 11 kVA
Water supply≤ 3 l/min, 2 Bar, max 20 °C≤ 6 l/min, 2 Bar, max 20 °C≤ 10 l/min, 2 Bar, max 20 °C≤ 14 l/min, 2 Bar, max 20 °C
Operating ambient temperature22 ± 2 °C
Storage ambient temperature15 – 35 °C
Relative humidity (non-condensing)≤ 80 %
Cleanness of the roomISO Class 7
  1. Due to continuous improvement, all specifications are subject to change without notice. The parameters marked ‘typical’ are indications of typical performance and will vary with each unit we manufacture. Presented parameters can be customized to meet customer‘s requirements.
  2. Maximum pulse energy specified at 840 nm, SH output at 420 nm, TH output at 280 nm and FH output at 210 nm.
  3. Harmonic outputs are optional. Specifications valid with respective harmonic module purchased. Outputs are not simultaneous. Maximum harmonic energy depends on OPCPA signal beam profile and pulse duration.
  4. Maximum pump energy for harmonics is limited to 10 mJ @ 840 nm.
  5. Standard pulse duration changes though the wavelength range – shortest pulse duration is achieved ~840 nm spectral range.
  6. Separate ‘F10’ option can be ordered to reduce pulse duration to ≤ 10 fs. Wavelength tunability not available with ‘F10’ option.
  7. Under stable environmental conditions, normalized to average pulse energy (RMS, averaged from 60 s).
  8. Measured over 8 hours period after 30 min warm-up when ambient temperature variation is less than ±2 °C.
  9. Super-Gaussian spatial mode of 6-11th order in near field.
  10. Beam diameter is measured at signal output at 1/e2 level for Gaussian beams and FWHM level for Super-Gaussian beams.
  11. Beam pointing stability is evaluated as movement of the beam centroid in the focal plane of a focusing element (RMS, averaged from 60 s).
  12. Pulse contrast is only limited by amplified parametric fluorescence (APFC) in the temporal range of ~90 ps which covers OPCPA pump pulse duration. APFC contrast depends on OPCPA saturation level. Our OPCPA systems are ASE-free and pulse contrast value in nanosecond range is limited only by measurement device capabilities (third-order autocorrelator). There are no pre-pulses generated in the system and post-pulses are eliminated by using wedged transmission optics.
  13. Optical pulse jitter with respect to electrical outputs:
    – Trig out > 3.5 V @ 50 Ω
    – Pre-Trig out > 1 V @ 50 Ω
    – PLL option > 1 V @ 50 Ω
  14. System sizes are preliminary and depend on customer lab layout and additional options purchased.
  15. Longer umbilical with up to 10 m for flash lamp pumped and up to 5 m for diode pumped systems available upon request.
  16. The laser and auxiliary units must be settled in such a place void of dust and aerosols. It is advisable to operate the laser in air conditioned room, provided that the laser is placed at a distance from air conditioning outlets. The laser should be positioned on a solid worktable. Access from one side should be ensured.
  17. Voltage fluctuations allowed are +10 % / -15 % from nominal value.
  18. Required current rating can be calculated by dividing power rating by mains voltage. Power rating is given in apparent power (kVA) for systems with flash lamp power supplies and in real power (kW) for systems without flash lamp power supplies where reactive power is neglectable.

Note: Laser must be connected to the mains electricity all the time. If there will be no mains electricity for longer that 1 hour then laser (system) needs warm up for a few hours before switching on.

Options

OptionDescriptionComment
-F10Short Pulse option reduces output pulse duration to ≤10 fsWavelength tunability not available with ‘F10’ option
-CEPCEP stabilization to ≤400 mradPassive and active CEP stabilization
-DM‘Deformable Mirror’ option for Strehl ration improvement to >0.9
-SH/TH/FHSecond, third and fourth harmonic outputsTypical conversion efficiency from signal is ~35 %, ~12 % and ~3 % respectively and depends on beam profile and pulse duration of the system. Harmonic outputs are not simultaneous with signal output
-ps outAdditional narrow spectra ps output that is optically synchronized to main system outputCan be simultaneous and non-simultaneous to the main system output. Offers full optical synchronization to fs pulses
-AWAir-Water coolingNo external water required. Heat dissipation equals total power consumption

Performance

Drawings & Images

Power Supply

CabinetUsable heightHeight H, mmWidth W, mmDepth D, mm
MR-99 U455.5 (519 1) )553600
MR-1212 U589 (653 1) )553600
MR-1616 U768 (832 1) )553600
MR-2020 U889 (952 1) )553600
MR-2525 U1167 (1231 1) )553600
  1. Full height with wheels.

Publications

Found total :
1 article, 1 selected
Application selected :
All Applications
All Applications
Scientific Applications
High Intensity Sources – laser produced plasma, x-ray source, extreme UV
OPCPA Systems – optical parametric chirped pulse amplification system

53 W average power CEP-stabilized OPCPA system delivering 5.5 TW few cycle pulses at 1 kHz repetition rate

Related applications:  High Intensity Sources OPCPA Systems

Authors:  R. Budriūnas, T. Stanislauskas, J. Adamonis, A. Aleknavičius, G. Veitas, D. Gadonas, S. Balickas, A. Michailovas, A. Varanavičius

We present a high peak and average power optical parametric chirped pulse amplification system driven by diode-pumped Yb:KGW and Nd:YAG lasers running at 1 kHz repetition rate. The advanced architecture of the system allows us to achieve >53 W average power combined with 5.5 TW peak power, along with sub-220 mrad CEP stability and sub-9 fs pulse duration at a center wavelength around 880 nm. Broadband, background-free, passively CEP stabilized seed pulses are produced in a series of cascaded optical parametric amplifiers pumped by the Yb:KGW laser, while a diode-pumped Nd:YAG laser system provides multi-mJ pump pulses for power amplification stages. Excellent stability of output parameters over 16 hours of continuous operation is demonstrated.

Published: 2017.   Source: Optical Society of America | Vol. 25, No. 5 | 6 Mar 2017 | OPTICS EXPRESS 5799

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